Just got me one of these USB MinoCam Webcam II things, and it’s actually surprisingly good. The image quality is excellent, but there again the packaging does say it’s got a light sensitivity of 0.6 lux (i.e less than a candle) and 8 megapixel resolution.

I’m not sure I believe the latter (probably interpolated up from 5 mp or something), but the results are cool. The other neat thing is the twisty camera head, which means you can straighten up the onscreen image irrespective of the camera orientation. No drivers needed either. Oh and there’s no mic included, so you need your laptop microphone for video chats. $19.00 without a stand.